Blur a moving object in a video

The part traditional editors make painful — a car driving past, a person walking through, anything in motion. Tap it once; the AI does the tracking, not you.

Edited resultOriginal
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Open the editor →3 FREE MINUTES · NO CARD

How it works

  1. 1

    Drop your video in and pause on any frame where the moving object is clearly visible.

  2. 2

    Tap it once — no drawing masks, no keyframes. The AI segments it and follows it through speed and direction changes.

  3. 3

    Press Blur and download the MP4 with the object hidden along its entire path.

What people use it for

  • Cars and plates passing through driving or street footage
  • People walking through the background of a locked-off shot
  • A phone, badge, or document someone carries across the frame
  • Fast-moving subjects where manual masks slip and jitter

Questions

How is this different from motion tracking in a desktop editor?
Classic trackers follow a box you draw and lose it when the object turns or gets occluded — then you repair keyframes by hand. Alterframe segments the object itself and re-finds it frame by frame, so there's nothing to babysit.
What if the track drifts on a hard clip?
Add reference taps on the frames where it goes wrong — up to 8 per object — and render again. Re-renders of the same video within 24 hours are free, so a difficult clip doesn't cost extra credits.
How much does it cost?
One credit covers one minute of video, and you get 3 free credits at signup — no card needed. Packs start at $9 for 15 minutes.
What formats can I upload?
MP4, MOV, and WebM, up to 60 minutes per video. The result downloads as MP4 with the original audio kept.
What happens to my video afterwards?
Your uploads are private to your account. Deleting an edit from your history also deletes the rendered result — and the uploaded video itself once no other edit uses it.
What if the edit tracks the wrong thing?
Re-rendering the same video within 24 hours is free (up to 3 fix-it renders per edit), so correcting a track never costs extra credits.

Related tools

Ready when you are — drop a video in, tap what should disappear, and the AI does the tracking.

Blur a moving object in a video →